Box body upper cover mold

Abstract

The utility model discloses a box body upper cover mold, and relates to the field of molds, the box body upper cover mold comprises a fixed mold core, a movable mold core and a pouring gate; the fixed mold core comprises a base and a convex mold, the movable mold core is matched with the convex mold, the pouring gate is arranged on the base on the fixed mold core and is connected to the root of the convex mold, and casting molten aluminum enters a casting mold space between the fixed mold core and the convex mold through the pouring gate; the runner is provided with an eagle-beak-shaped upwarp opening at the root part of the male die, and casting molten aluminum is fed into a casting mold space along the eagle-beak-shaped upwarp opening and an upwarp parabola. The embedding groove special for the pouring gate is formed in the base of the fixed mold core, the pouring gate injects molten metal from the bottom of the movable mold core from bottom to top, and the eagle beak type upwarp opening is formed in the tail end of the pouring gate, so that the molten metal can be injected upwards in an inclined mode in a parabola form, and the situation that the side wall of a product is directly impacted to pull the product upwards is avoided; and compared with the problem of pressure loss caused by upward filling after impact on the side wall, cold shut cannot be formed at the upper end, so that the product quality can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of molds, and in particular to a box cover mold. Background Art

[0002] When die-casting aluminum alloy motor products, because the product body is high, the feed port is often designed at the bottom of the mold, and the straight runner fills the mold from bottom to top after the aluminum liquid is introduced. This bottom-up filling mode of the feed port impacts the side wall of the product, causing the product to be stretched. At the same time, the aluminum liquid fills upward after impacting the side wall, resulting in a large pressure loss, poor molding of the upper part of the product, that is, a cold shut occurs at the upper end of the product, which places certain requirements on the product molding quality. Utility Model Content

[0003] The present application provides a box cover mold to solve the problem that the aluminum liquid impacts the side wall of the product at the feed port, causing product damage and cold shut at the upper end of the product. The radiator base mold includes a fixed mold core, a movable mold core and a runner; the fixed mold core includes a base and a punch, the movable mold core matches the punch, the runner is arranged on the base on the fixed mold core and connected to the root of the punch, and the cast aluminum liquid enters the mold space between the fixed mold core and the punch through the runner;

[0004] The runner is provided with an eagle-beak-shaped upward-curved opening at the root position of the punch, and the cast aluminum liquid is sent into the mold space along the eagle-beak-shaped upward-curved opening and along an upward-curved parabola.

[0005] Specifically, the punch is located at the center of the base, and the movable mold core is sleeved on the punch.

[0006] Specifically, a receiving groove is provided on the base, the receiving groove is located at the root of the punch, and the size of the receiving groove matches the size of the punch.

[0007] Specifically, a runner embedding groove is also provided in the accommodating groove, one side of the runner embedding groove forms a runner opening at the edge of the base, and the other side of the runner embedding groove extends to the root of the punch.

[0008] Specifically, the runner includes two sections of a vertical runner section and a horizontal runner section that are connected to each other, and the horizontal runner section is embedded in the runner embedding groove along the runner opening.

[0009] Specifically, an eagle-beak-shaped upward-turned opening is arranged at the end of the horizontal section runner, and the cast aluminum liquid flows in from the vertical section runner and flows out from the eagle-beak-shaped upward-turned opening of the horizontal section runner.

[0010] Specifically, a plurality of raised pillows are arranged on the groove wall of the runner embedding groove close to the root of the punch, and the eagle-beak-shaped upwardly tilted opening sits above the pillows and extends into the mold space.

[0011] Specifically, a plurality of embedding holes are opened on the base at the other side of the punch, and slag bags are arranged in the embedding holes. The slag bags are close to the root of the punch and connected to the casting mold space.

[0012] Specifically, the slag bag is evenly distributed at the root of one side of the punch.

[0013] Specifically, the base is provided with flow channels whose number matches the slag bags, and the flow channels are connected with the embedding holes.

[0014] The beneficial effects brought about by the technical solution provided in the embodiments of the present application include at least: the present application opens an embedded groove dedicated to the runner on the base of the fixed mold core, allowing the runner to inject molten metal from the bottom up from the bottom of the movable mold core, and an eagle-beak-shaped upward opening is provided at the end of the runner, so that the molten metal can be injected obliquely upward in the form of a parabola, avoiding directly impacting the side wall of the product and pulling the product up. Compared with the problem of pressure loss caused by filling upward after impacting the side wall, no cold shut will be formed at the upper end, thereby effectively improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the box cover mold provided in an embodiment of the present application;

[0016] Figure 2 This is an exploded schematic diagram of the box cover mold;

[0017] Figure 3 yes Figure 2 A magnified schematic diagram of center A.

[0018] Figure numerals: runner-10, vertical section runner-11, horizontal section runner-12, eagle-beak type upturned opening-13, fixed mold core-20, base-21, punch-22, accommodating groove-23, runner embedding groove-24, pillow position-25, runner opening-26, embedding hole-27, runner-28, movable mold core-30, slag bag-40. DETAILED DESCRIPTION

[0019] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0020] The term "multiple" as used herein refers to two or more than two. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0021] Figure 1is a schematic diagram of the structure of the box cover mold provided in the embodiment of the present application, Figure 2 The figure is an exploded schematic diagram of the mold for the upper cover of the box. The mold structure includes a fixed mold core 20, a movable mold core 30 and a runner 10. The fixed mold core 20 is divided into a base 21 and a punch 22. The punch 22 and the base 21 are an integral structure. The movable mold core 30 matches the shape of the punch 22. During casting, the movable mold core 30 is placed on the punch 22. The mold space formed between the movable mold core 30 and the punch 22 is the product after casting. In actual die-casting production, because the product is relatively high, the traditional runner feed port is set horizontally, and the impact on the side wall of the product during casting causes the product to be stretched.

[0022] The present embodiment improves it as follows: the runner 10 is set on the base 21 on the fixed mold core 20 and connected to the root position of the punch 22, and the cast aluminum liquid enters the mold space between the fixed mold core 20 and the punch 22 through the runner 10. The special feature is that the runner 10 is provided with an eagle-beak-shaped upward-curved opening 13 at the root position of the punch 22, and the cast aluminum liquid follows the eagle-beak-shaped upward-curved opening 13. The cast aluminum liquid forms a warped parabola at the outlet due to the kinetic energy, and the aluminum liquid is sent upward into the mold space. This step is changed from horizontal impact entry to oblique upward parabola delivery, which can greatly reduce the kinetic energy impact of the liquid and reduce the possibility of product damage.

[0023] In some embodiments, the base 21 is set to a rectangular or square structure, the punch 22 is set to the center of the base 21, and the movable mold core 30 is sleeved on the punch 22. The specific shape and height of the punch 22 and the movable mold core 30 are determined according to actual conditions, and this application does not limit this. In order to inject the aluminum liquid from the root of the punch 22, a receiving groove 23 is selected to be opened on the base 21. The receiving groove 23 is located at the root of the punch 22, and the size matches the size of the punch 22. Then, a runner embedded groove 24 is further opened in the receiving groove 23. One side of the runner embedded groove 24 forms a runner opening 26 at the edge of the base 21, and the other side extends to the root of the punch 22.

[0024] Figure 3 yes Figure 2 In the enlarged view of A in the middle, because the casting is from bottom to top, an L-shaped runner 10 is selected for the convenience of injection, which includes two sections of vertical runner 11 and horizontal runner 12 connected to each other, and the casting aluminum liquid flows in from the vertical runner 11. The horizontal runner 12 is embedded in the runner embedding groove 24 along the runner opening 26, and an eagle-beak-shaped upward opening 13 is set at the end of the horizontal runner 12. The casting aluminum liquid flows in from the vertical runner 11, flows out from the eagle-beak-shaped upward opening 13 of the horizontal runner 12, and enters the casting space.

[0025] In some embodiments, a plurality of raised pillows 25 are provided on the wall of the runner embedding groove 24 near the root of the punch 22, and the eagle-beak-shaped upward-turned opening 13 is seated above the pillows 25 and extends into the mold space. The design of the pillows 25 can enhance the stability of the outlet, and the design of parameters such as the angle of the upward-turned mouth and the width of the outlet are specifically determined according to the height and thickness of the product.

[0026] In some embodiments, because of the presence of casting metal slag and other impurities, as well as the generation of bubbles and cold shut, a slag bag 40 can be further arranged on the base. Specifically, a plurality of embedded holes 27 are opened on the base 21 on the other side of the punch 22, and a slag bag 40 is arranged in the embedded hole 27. The slag bag 40 is close to the root of the punch 22 and connected to the casting mold space. The number of specific slag bags 40 is determined according to actual conditions and is evenly distributed at the root of one side of the punch 22. In addition, a flow channel 28 matching the number of slag bags 40 is also opened on the base 21, and the flow channel 28 is connected to the embedded hole 27. The use of the slag bag 40 can collect these impurities to ensure that the molten metal is not contaminated before flowing into the mold cavity. In addition, because bubbles may be generated when a liquid with too fast a flow rate enters the mold cavity, the use of the slag bag plays a buffering role in the flow channel system, which can reduce the flow rate and reduce the generation of bubbles. In addition, the slag bag can also play a role in controlling the pressure and temperature of the molten metal. After entering the slag bag, the molten metal is blocked to form a barrier layer, which slows down the speed of the liquid flow. In this way, the temperature and pressure of the molten metal can be effectively controlled.

[0027] To summarize, the present application opens an embedded groove dedicated to the runner on the base of the fixed mold core, allowing the runner to inject molten metal from the bottom of the movable mold core from bottom to top, and an eagle-beak-shaped upturned opening is provided at the end of the runner, allowing the molten metal to be injected obliquely upward in a parabolic form, avoiding direct impact on the side wall of the product and pulling the product up. Compared with the problem of pressure loss caused by filling upward after impacting the side wall, no cold shut will be formed at the upper end, thereby effectively improving the product quality.

[0028] The preferred embodiments of the present invention are described above; it should be understood that the present invention is not limited to the above-mentioned specific implementation modes, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention; therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A box cover mold, characterized in that: The invention comprises a fixed mold core (20), a movable mold core (30) and a runner (10); the fixed mold core (20) comprises a base (21) and a punch (22); the movable mold core (30) matches the punch (22); the runner (10) is arranged on the base (21) on the fixed mold core (20) and connected to the root of the punch (22); the cast aluminum liquid enters the casting mold space between the fixed mold core (20) and the punch (22) through the runner (10); The runner (10) is provided with an eagle-beak-shaped upward-curving opening (13) at the root position of the punch (22), and the cast aluminum liquid is sent into the mold space along the eagle-beak-shaped upward-curving opening (13) and along an upward-curving parabola.

2. The box cover mold according to claim 1, characterized in that: The convex mold (22) is located at the center of the base (21), and the movable mold core (30) is sleeved on the convex mold (22).

3. The box cover mold according to claim 1, characterized in that: A receiving groove (23) is provided on the base (21), the receiving groove (23) is located at the root of the punch (22), and the size of the receiving groove (23) matches the size of the punch (22).

4. The box cover mold according to claim 3, characterized in that: A runner embedding groove (24) is also provided in the accommodating groove (23), one side of the runner embedding groove (24) forms a runner opening (26) at the edge of the base (21), and the other side extends to the root of the punch (22).

5. The box cover mold according to claim 4, characterized in that: The runner (10) comprises two sections of a vertical runner (11) and a horizontal runner (12) which are connected to each other. The horizontal runner (12) is embedded in the runner embedding groove (24) along the runner opening (26).

6. The box cover mold according to claim 5, characterized in that: An eagle-beak-shaped upward-turned opening (13) is arranged at the end of the horizontal section runner (12), and the cast aluminum liquid flows in from the vertical section runner (11) and flows out from the eagle-beak-shaped upward-turned opening (13) of the horizontal section runner (12).

7. The box cover mold according to claim 5, characterized in that: A plurality of raised pillows (25) are arranged on the groove wall of the runner embedding groove (24) near the root of the punch (22), and the eagle-beak-shaped upward-turned opening (13) sits above the pillows (25) and extends into the mold space.

8. The box cover mold according to claim 4, characterized in that: A plurality of embedding holes (27) are provided on the base (21) on the other side of the male mold (22). A slag bag (40) is arranged in the embedding hole (27). The slag bag (40) is close to the root of the male mold (22) and is connected to the casting mold space.

9. The box cover mold according to claim 8, characterized in that: The slag bag (40) is evenly distributed at the root of one side of the punch (22).

10. The box cover mold according to claim 9, characterized in that: The base (21) is also provided with flow channels (28) whose number matches the number of the slag bags (40), and the flow channels are connected to the embedding holes (27).

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